Wordpress/SEO Tag Generator

I find myself looking for optimal tags quite often in Wordpress, especially after I've written an article. Any possible chance to create an SEO option for Tag generation (after an article has been written). Maybe the generator scans the post (URL) and finds repeated words or commonalities in the post and generates a list of tags (pre-formatted, separated by commas) for copy/paste into Wordpress.

Would also make a great Wordpress plugin tool option too. :)

Thanks!